Change-speed gearing.



PATEN'IED JAN. 15, 1907.

' S. BRAMLEY- -MO ORB. CHANGE SPEED GEARING.

APPLIOALTION FILED MAR. 30, 1906 WITNESSES. N-VENTOJR.

dimly-# 011 v 1 UNITED s1rrrr. s PATENT OFFICE.

Specification of Letters Patent.

Patented J an. 15, 1907.

Application filed March 30,1906. Serial No. 308,896.

To all whom it may concern:

Be it known that I, SWINFEN BRAMLEY- MOORE, a subject of the King of Great Britain and Ireland, residing at 26 Russell Square, Bloomsbury, in the county of London, England, have invented a new and useful Improvement in Change-Speed Gearing, of which'the ollowing is a full and complete specification.

This invention relates to an improved change-speed ear particularly adapted for motor road-ve licles of the kind comprising a driving and driven shaft arranged in line, a counter-shaft parallel to said shafts, and trains of gearing connecting said shafts, the object being to obtain a greater number of velocity ratios with the same number of wheels or an equal number of velocity-ratios with a lesser number of wheels than at pres ent obtains.

In the accompanying drawings, which illustrate this invention, Figures 1 to 9, in elusive, are diagrammatic views of a gear consisting of ten wheels, which give six forward speeds and three reverse speeds. Fig. 10 is a view in plan of such a gear arranged for use in motor road-vehicles.

Throughout the views similar parts are marked with like letters of reference.

The driving or engine shaft 1) and the driven shaft were arranged in axial alinoment with their abutting ends preferably arranged to mutually support one another by interengagement, as shown. The countershaft 2 is arranged parallel with the driving and driven shafts, and on it are formed or fixed four spur-wheels a, b, c, and d, spaced at approximately equal distances apart. In permanent gear with the wheel I) on the countor-shaft is a wheel 'm, freely mounted on one or other of the axles o and m at their junction, so as to be free to rotate independently of either. A convenient method of doing this 1s to reduce the end of one axle to form a bearing on which the wheel in can revolve,

part of the said reduced end engaging a corresponding recess in the abutting end of the other axle. On the shaft 7 is a sliding spurwheel :10, adapted to gear with the whc l a on the counter-shaft, and on the shaft 11: is both a sliding spunwheel y, adapted to gear with the wheel 0, and'a wheel a in permanent gear with the wheel (Z on the counter-shaft. The wheel n is free to rotate on the shaft 10 inclependcntly of said shaft; but the wheels 00 and y are so mounted on their respective shafts as to have no independent rotary motion apart from said shaft, a convenient method being toform those parts of the shafts 'U and w on which the said Wheels slide square, as shown in Fig. 10, the eyes in the bosses of the wheels being made of corresponding shape. These two wheels are, however, so mounted on their respective shafts as to be free to slide longitudinally thereon and are provided with any suitable form of shifting mechanism to eifect such sliding movements.

The wheels at and n are provided on' one side and the wheels m and 'y on both sides with teeth or serrations forming dog-clutches whereby the said wheels can be interlocked to produce" the various chan es of speed. With the wheels :1: and y bothoIutched to the wheel m, as shown in Fig. 6, the two shafts 'v and w are locked together, and therefore rotate at the same speed, giving What is known as a direct drive, the ratio of the speeds of the two shafts v and to being one to one.

With the wheel w clutched to the wheel m i wheel as clutched to the wheel m and the wheel y clutched to the wheel n, as shown in Fig. 4, the ratio is nine to two. WVith the wheel a: in gear with the wheel a and the wheel y clutched to the wheel n, 'as shown in Fig. 3, the ratio is nine to one.

' The reverse-gear consists of a air of wheels 1" and 8, fixed on a counter-she t u, the wheel 8 being in constant gear with the wheel a on the counter-shaft 2. When the wheel a; is in gear with the wheel r, the three reverse speeds are obtained as follows: wheel {1/ clutched to the wheel-"m, as shown in Fig. 7, giving a ratio of "four to one, wheel 11/ in gear with the wheel 0, as shown by Fig. 8, giving a ratio of sixteen to three, and wheel g clutehed to the wheel 12 as shown in Fig. 9, giving a ratio of eighteen to one.

It will be seen that in the gearing produced by the arrangement of wheelsshown in Figs. 1, 2, 5, 6, 7, and S the wheel n is running idle. Consequently by dispensing with the two wheels (1 and 'n a gear consistin of eight Wheels remains, giving fourforwar and two reverse 5 eeds, the forward speeds being obtained withthe-wheels in the'positions shown by Figs; 1', 2 ,5, and 6 and the reverse speeds as shown by Figs? and 8.,

It will be seen that in producin the direct drive from the shaft v to the s aft w the i-countershaft z'isrotatingidly on account of the wheel m'being permanently in gear with the axles, as shown in Fi 10, bot [the wheel m and thesleeve being ormed with teeth or serrations, so that thf wheels a: and y, as

fshown Figs. 1 to 9, can engageeitherthe I sleeve 0 to connect the shafts v and wtoters Patent, is. 5

gether/to produce the direct drive or both the sleeve o and the wheel m to'producelthe combinations shown by Figs. 1, 4, 5, ,fij'and 7.

What I claim, and e'sireto secure by Let- 1. ,A chan e-s eed ear com"risin a drivand a driven sha arrange d in ax1al line, a counter-shaftparallel with the said driving and driven shafts, a s ur-wheel mounted freely at the junction of t e driving and driven shafts, a spur-wheel fixed on the countereshaft with wluch the aforesaid spurwheel is in constant mesh, a slidin s urwheel on the driving-shaft, aspur-whee on the countereshaft with which. the sliding spur-wheel on the driving-shaft can en age, one or more spur-Wheelson the'driven s aft, one or more spur-wheels on the counter-shaft with which the spur-wheels on the said driven shaft engage and means for locking the spur-wheel mounted at the junction of the driving and driven shafts to either of the said shafts, or to both, as set forth.

2. A change-speed gear comprising a driving and a driven shaft arranged in the same axial line, a counter-shaft arallel with the said driving anddriven sha ts, a sleeve freely mounted at the junction of the driving and driven shafts, a spur-wheel freely mounted on said sleeve, a spur-wheel fixed on the counter-shaft with which the aforesaid spurwheel is .in constant mesh, a sliding s urwheel on the driving-shaft, a spur-whee on the counter shaft" with which the sliding spur-wheel on the drivin -shaft engages L one or more spur-wheels on t e driven shaft, one

' or more spur-wheels on the counter-shaft with which the spur-wheels on said drivingshaft engage, and means for locking the spurwheel mounted at the junction of the driving and driven shafts to either of thesaid shafts, or to both, as set -forth.

3. A change-speed gear comprising a driving and a driven shaft arranged in the same axial line and having their adjacent ends abutting or interengagmg a spur-wheel e same mounted freely at the junction of the said shafts, means for positively connecting said spur-wheel to either or both of the said shafts, a counter-shaft parallel with the driving and driven shafts, three or more spur-wheels fixed on the counter-shaft one of'which is constantly in mesh with the spur-wheel mounted at the junction of the driving and driven shafts, a spur-wheel mounted on the driving-shaft, means for causing the spur-wheel on the driving-shaft to either impart motion to one of the spur-wheels on the counter-shaft or to run idle with respect thereto, one or more spur-wheels on the driven shaft, and means for bringing said wheel or whe'ls into engagement with the spur wheel or wheels on thecounter-shaft whereby the motion of said shaft is transmitted to the driven shaft, as

set forth.

4. IA change-speed gear comprising a drivingand a driven shaft arranged in the same axial line and having their adjacent ends abutting or interengaging, a sleeve mounted i.

freely at the junction of the saidshafts a spur-wheel mounted freely on said sleeve, means for ositively connecting said spurwheel ands eeve to either or both of the said shafts, a counter-shaft parallel with the drivand drivenshafts, three or more s uring wheels fixed on the counter-shaft one of W 'ch 9 5 I is constantly in mesh with the spunwheel mounted at the junction of the driving and driven shafts, a sliding spur-wheel on the driving-shaft, means for causing said slid.- ing spur-wheel to either impart motion to one of the spur-wheelsonthe counter-shaft or to runidle with respect thereto, one or more spur-wheels on the driven shaft, and means for bringing said wheel or wheels into engagement with the spur wheel or wheels on the counter-shaft whereby the motion of said shaft is transmitted to the driven shaft, as set forth.

5. The combination with a change-speed gear consisting of a driving and driven shaft in axial alinement, a counter-shaft parallel to said driving and driven shafts, a driving s ur Wheel on the driving-shaft, a spur-whee on the counter-shaftwith which the driving spurwheel on the driving-shaft engages and one or more trains of wheels connecting the countershaft with t e driven shaft, of a second driving spur-whe ll'reely mounted at the junction of the driving and driven shafts, a spur-wheel on the counter-shaft with which said second driving-wheel ermanently gears, means for locking said'w eel to either of said shafts or to both whereby said wheel operates to give' a second velocity ratio between the drivingshaft and the counter-shaft and enables a direct drive from the driving to the driven in axial alinement, of a counter-shaft mounted parallel with the driving and driven shafts, three spur-wheels fixed on said counter-shaft,

- one free spur-wheel mounted at the junction of the driving and driven shafts and permanently in mesh with one ofthe wheels on the counter-shaft, and two sliding spur-wheels mounted respectively on the driving and driven shafts soas to rot: 'ewith said shafts and capable of meshing with two spur-wheels on the counter-shaft the said wheels having teeth or serrations on their'bosses whereby they can be interlocked with the freelymounted spur-wheels, as set forth.

7. In a change-speed gear, the combina-' tion with a driving and drlven shaft arranged in axial alinement, of a counter-shaft mounted arallel with the drivingX and driven sha s, three spur wheels ed on said counter-"shaft, one free spurawheel mounted at the junction of the drivin and driven shaftsand-permanently in mes with one of the three spur-wheels on the counter-shaft, two sliding spur-wheels mounted respectively on the drivin and driven shafts so as to rotate with sai shaftsand capable of meshing with the other two spur-wheels on the counter-shaft the said wheels having teeth or serrations on their bosses whereby they can be interlocked with the freelymounted spur-wheels, a second counter-shaft, and two 'spur pinions carried thereby one of which is in permanent mesh with the wheel on the first counter-shaft with which the sliding wheel on the driving-shaft engages and the other of which gears with the sllding wheel on the driving-shaft, as set forth. j

8. In a change-speed gear, the combination with a driving and driven shaft arranged in axial alinement, of a counter-shaft mounted arallel with the driving and driven sha s, four spur-wheels fixed on said countershaft, a free spur-wheel mounted at the junction of the driving and driven shafts and permanently in mesh with one of the wheels.-

on the counter-shaft, a free spur-wheel on the driven shaft permanently in mesh with one of the wheels on the counter-shaft, and two sliding s ur-wheels mounted respectively on the drivin and driven shafts so as to rotate with said s afts and capable of meshing with V shaft, a free spur-wheel mounted at the junction of the driving and driven shafts and permanently in mesh with one of the three spur-wheels on the counter-shaft, a free spurwheel on the driven shaft permanently in mesh with one of the wheels on the countershaft, two sliding spur-wheels mounted respectively on the driving and driven shafts so as to rotate with said shafts and capable of meshing with the other two spur-wheels on the counter-shaft, the said wheels having teeth or serrations on their bosses whereby they can be interlocked with the "freelymounted wheels a second counter-shaft, and two spur-pinions carried thereby one of which is in permanent mesh with the wheel on the main counter-shaft with which the sliding wheel on the driving-shaft en ages and the other of which gears with the sliding wheel on the driving-shaft, as set forth.

SWINFEN BRAMLEY-MOORE.

Witnesses:

A. MILLWARD FLAcK, G. V. SYMEs. 

